I guess the other option was to continue risking his life with bullets whizzing by his ears for two more years?

As has already been noted, it's not difficult or uncommon for soldiers, especially decorated ones, to request and be granted reassignment.

Some of the guys that have been active can correct me, but it's my understanding that upon getting 'career status' you are no longer under set commitments; you can resign your commission essentially at any time.

All he needed to do was go to his superiors and suggest that he would like to be reassigned. If that didn't work, he could advise that he would likely have to resign his commission. At that point they almost certainly would've granted him his reassignment.

My good friend keeps trying to resign his commission and they keep promoting him. The armed forces do a lot to retain their best soldiers and there's little doubt that this individual would qualify.

And, if has also been suggested, his brain is too fried to continue in the SEALs, he'd almost certainly qualify for some form of partial disability, which would entitle him to his health benefits if nothing else, though there's almost always a salary outlay as well.

If you read this article critically, you'll see a few things that don't make a hell of a lot of sense about it.